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Rectifier - Half Wave ·Rectifier

872

Directly heated high-current mercury-vapor half-wave rectifier for high-voltage supplies. Its heavy filament and low mercury-arc voltage provide ampere-class output.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
A4-29
Socket code
J4
Base pins
4
Nominal heater
5 V / 10 A

Description

High-current mercury-vapor half-wave rectifier for high-voltage power supplies.

Socket description

Jumbo 4-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
A4-29
Socket code
J4
Base pins
4
Nominal heater voltage
5 V
Nominal heater current
10 A
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

A4-29 - Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

1 physical section, each with unique specifications.

Section 1

Rectifier

X-ray radiationInterelectrode capacitances
Rectifier peak inverse voltage
10000 V
Rectifier nominal output current
1.25 A
Rectifier peak forward current
5 A
Rectifier forward voltage drop
10 V
Rectifier warm-up time
30 s

Promoted values are taken from printed General Characteristics / Maximum Ratings. Additional published conditions and operating data are preserved in parameters.

Source-dependent data

Operating conditions by source

Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.

Data set 01

1938 RCA Transmitting Tubes

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

  • HeaterVoltageNominal

    5 V

    Nominal

  • HeaterCurrentNominal

    10 A

    Nominal

  • Maximum Peak Inverse Voltage

    7500 V

  • Rectified Output Current

    1.25 A

  • PeakForwardCurrent

    5 A

Characteristic

  • Forward Voltage Drop

    15 V

Data set 02

193X Taylor Transmitting

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

  • Filament Voltage

    5 V

    Nominal published value

  • Filament Current

    10 A

    Nominal published value

  • Inverse Peak Voltage

    10000 V

    Half-wave mercury-vapor rectifier

  • Peak Current

    2.5 A

    Half-wave mercury-vapor rectifier

Characteristics

  • Approximate Voltage Drop

    15 V

    Per tube

Data set 03

1945 United Electronics

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

  • Filament voltage

    5 V

    Nominal general rating

  • Filament current

    10 A

    Nominal general rating

Data set 04

1946 Standard Telephone and Cables

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

  • Supply frequency

    50 Hz

    ChokeInputFilter

  • Minimum cathode heating time

    1 min

Data set 05

1950 Eimac Tubes

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Characteristic

  • Filament Voltage

    5 V

  • Filament Current

    7.5 A

  • Approximate Tube Voltage Drop

    10 V

  • Recommended Condensed Mercury Temperature

    40 C

    ±5 C

  • Initial Mercury Redistribution Heating Time

    10 min

    No plate voltage

  • Normal Filament Warm-up Before Plate Voltage

    30 s

    Approximate

Other

  • Maximum Peak Inverse Anode Voltage

    10000 V

    At condensed-mercury temperature 20-60 C

  • Maximum Peak Anode Current

    5 A

  • Maximum Average Anode Current

    1.25 A

  • Maximum Supply Frequency

    150 Hz

    At 10 kV PIV

  • Condensed Mercury Temperature Range

    20-60 C

Application

  • Preferred Filter Type

    Choke input

    Greatest usable DC output current

  • Condenser-Input Filter Note

    Peak current relatively high; capacitor voltage may approach 1.4× transformer RMS voltage

Data set 06

1962 Eimac

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

  • Condensed Mercury Temperature Range

    20 to 60 C

  • Supply Frequency Maximum

    150 Hz

Data set 07

1968 General Electric Co

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Characteristic

  • Heating Time

    30 s

    Typical

Other

  • MaximumInstantaneousAnodeCurrent

    5 A

  • Maximum Surge Anode Current

    50 A